Stand Alone Simulations

Hello, when Flash Player was in place I had simulation practices that I shared with my participants in webinars sessions.  After Flash stoped working I share the Zip folders, to unzip and then select the content, etc. This process has not been so good.  Is there some way I can publish these simulations in another format similar to what Flash provide us?  Some ideas of what you are doing to substitute what we had before would be great.